layout -- One of 'array', 'packed' 'other', or a compressed layout
block_width -- The block width if the format is compressed, 1 otherwise
block_height -- The block height if the format is compressed, 1 otherwise
layout -- One of 'array', 'packed' 'other', or a compressed layout
block_width -- The block width if the format is compressed, 1 otherwise
block_height -- The block height if the format is compressed, 1 otherwise